21411214343 has 4 divisors (see below), whose sum is σ = 21439499400. Its totient is φ = 21382929288.

The previous prime is 21411214337. The next prime is 21411214387. The reversal of 21411214343 is 34341211412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21411214343 - 2⁴ = 21411214327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411210343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14141393 + ... + 14142906.

It is an arithmetic number, because the mean of its divisors is an integer number (5359874850).

Almost surely, 2^21411214343 is an apocalyptic number.

21411214343 is a deficient number, since it is larger than the sum of its proper divisors (28285057).

21411214343 is an equidigital number, since it uses as much as digits as its factorization.

21411214343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28285056.

The product of its digits is 2304, while the sum is 26.

Adding to 21411214343 its reverse (34341211412), we get a palindrome (55752425755).

The spelling of 21411214343 in words is "twenty-one billion, four hundred eleven million, two hundred fourteen thousand, three hundred forty-three".